Oxalis. GERANIACEiE. 367 



-1— Scapes 1-flowered : capsule round-ovoid, few-seeded. 

 O. AcetOSella, L. Sparingly villous : petioles a spau long or less ; leaflets 5 to 8 lines 

 long and considerably wider, obcordate, with a small membranous fold in the sinus : scapes 

 solitary or few, slender, a little longer than the leaves, bibracteate shortly above the middle : 

 flowers about 8 lines long : sepals ovate-oblong, rather obtuse, purple-tipped : petals obovate, 

 broadly notched, about 4 times as long as the calyx: capsule a line and a half long; seeds 

 ovoid, acute above, obscurely pitted and with about 5 shallow grooves on each side. — Spec, 

 i. 433; Jacq. Oxal. 20, 114, t. 80, f. 1 ; Reichenb. Ic. Fl. Germ. v. t. 199, f. 4898; Kaf. Med. 

 Bot. ii. 46, t. 68 ; Torr. & Gray, Fl. i. 211 ; Trelease, Mem. Boston Soc. Nat. Hist. iv. 90, t. 

 11, f. 7. 0. longijiora, L. Spec. i. 433. 0. Avtericana, Bigel. in DC. Prodr. i. 700; Zucc. 

 Oxal. 26, & Nachtr. 35. — New Brunswick to Minnesota, south to Virginia and the mountains 

 of North Caroliua. (Old World.) Recurved scapes bear cleistogene flowers mostly concealed 

 among the moss, etc., at base of the plant. 



O. Oregana, Nutt. Coarser and more densely rusty-villous : petioles sometimes a foot 

 long; leaflets becoming 1^ inches long, then relatively narrow: scapes shorter than the 

 leaves, an inch to a span long, broadly bibracteate an inch or less below the flower : petals 

 nearly an inch long : capsule 5 lines long ; seeds nearly 2 lines long: otherwise resembling 

 the preceding. — Nutt. in Torr. & Gray, Fl. i. 211. 0. Acetosella, var. Oregana, Trelease, 

 1. c. 90. Oxys Oregana, Greene, Man. Bay- Reg. 71. — Mountains, Washington to Central 

 California. 



+- -i— Scapes umbellately several-flowered : capsule linear-oblong, several-seeded. 



O. trilliifolia, Hook. Aspect of larger specimens of tlie last, at most sparingly villous : 

 petioles sometimes a foot long; leaflets 1 to 2 inches long, relatively narrow when large: 

 scapes mostly several, as long as the leaves, umbellately about 6-flowered ; pedicels from 

 half inch becoming as much as 3 inches long : bracts narrow, acute : sepals ovate-lanceolate, 

 variously acute : petals nearly white, deeply notched, 3 to 6 lines long, scarcely twice as 

 long as the calyx: capsule 10 to 15 lines long; seeds reddish brown, oblong, somewhat 

 longitudinally striate, obscurely coarsely pitted, a line long. — Fl. Bor.-Am. i. 118 ; Torr. & 

 Gray, Fl. i. 211 ; Trelease, 1. c 90, t. 11, f. 9. 0. Oregana, Brew. & Wats. Bot. Calif, i. 96, 

 as to fruit and, in part, inflorescence. — Mountains, W. Washington and Oregon. 



* * * Acaulescent, perennial from a scaly bulb, in summer with slender scaly bulb- 

 tipped rhizomes: flowers rose-violet, heterogone trimorphous (the mid-styled form some- 

 times suppressed): leaves palmately 3-10-foliolate : sepals (and usually leaflets) tipped 

 with orange callosities. 



•)— Capsules round-ovoid : leaflets 3, obreniform to openly cordate. 



O. violacea, L. Glabrous or the pedicels and leaf-bases very exceptionally a little pubes- 

 cent : petioles 1 to 6 inches long ; leaflets 3 to 8 lines long, somewhat wider, broadly obcor- 

 date with divergent lobes, or obreniform, somewhat succulent : scapes once or twice as high 

 as the leaves, umbellately 3-15-flowered : flowers 7 to 10 lines long; slender pedicels at 

 length somewhat longer, recurved before and after flowering : sepals oblong-ovate, rather 

 obtuse, with 2 more or less confluent callosities at apex : petals undulate or truncate, 3 times 

 as long as the calyx : capsule 2\ lines long, a little exceeding the sepals; seeds compressed- 

 ovoid, irregularly rngose-tuberculate, three fourths line long. — Spec. i. 434 ; Jacq. Oxal. 16, 

 35, t. 80, f^ 2, & Hort. Vind. ii. t. 180 ; Sims, Bot. Mag. t. 2215 ; Ell. Sk. i. 525 ; Zucc. Oxal. 

 19, & Nachtr. 27 ; Torr. & Gray, Fl. i. 211 ; Gray, Gen. 111. ii. 112, 1. 144, f. 1-6 ; Baill. Hist. 

 PI. V. 24, f. 64 ; Trelease, 1. c. 90, 95, t. 11, f. 10, Am. Nat. xvi. 13, f. 1-2, Bot. Gaz. xiii. 

 191, t. 12, & Trans. St. Louis Acad. v. 289. — New England to the Dakotas, Colorado, New 

 Mexico, and Florida. Said to be introduced in Ceylon (Trimen, Handbook, i. 197), and 

 Italy (Beguinot, Bull. Soc. Bot. Ital. 1895. 110). In late summer and autumn, after tlie 

 leaves have disappeared, some specimens flower ag.ain on long slender scapes, the pedicels 

 occasionally elongated and Iiranched. An albino is also sometimes found. 



•t— •)— Capsule oblong-ovoid (unknown in 0. divergens). 

 ■H- Leaflets 3, large, thin, obcordate. 

 O. MartiAna, Zucc. Large and lax, the leaflets with deep narrow sinus, without apical 

 callosity, but dotted ou the uuder surface and with a marginal row of small round orange 



